# Tk_radial_prime_in_color.py

# Tk_radial_prime_in_color.py

from Tkinter import *
from math import sqrt, atan2
from random import shuffle as rs

def oRGB(rgb): # pass
    r,g,b = rgb
    return "#%02x%02x%02x" % (r,g,b)

COLORS = 'red orange yellow green blue purple'.split()*5
color = 0
Lc = len(COLORS)

ww = 600
hh = 600
root = Tk()
root.title("# Tk_radial_prime_in_color")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh)
canvas.grid()

def isPrime(num):
    a=2
    while a <= sqrt(num):
        if num%a < 1:
            return a%Lc
        a=a+1
    return 0

# to record spiral
stepSize = 5
cols = ww / stepSize
rows = hh / stepSize
x = x0 = ww / 2
y = y0 = hh / 2
xy = []
for y in range(0,hh,stepSize):
    for x in range(0,ww,stepSize):
        distance = sqrt((x0-x)**2+(y0-y)**2)
        xy2 = atan2(x-x0,y-y0)
        xy.append(((int(distance), xy2),x,y))

xy.sort()
xy = [(x,y) for z,x,y in xy]

step = 1
for x,y in xy:
    color = isPrime(step)
    t = stepSize
    canvas.create_rectangle((x,y,x+t,y+t), fill=COLORS[color], outline='')
    step += 1
    COLORS = COLORS + [COLORS.pop(0)]
canvas.update()